gm2d

gm2d is a term used for several software projects that provide two-dimensional geometry processing and rendering capabilities. In its most widely referenced form, gm2d denotes a lightweight, cross-platform library intended to help developers integrate 2D graphics, geometric algorithms, and visualization into applications. Because the name is used by more than one project, the exact API, backends, and licensing can vary between implementations.

Core features typically include a set of 2D primitives (points, lines, curves, polygons) and a suite of geometric operations such as intersections, unions, offsets, and boolean composition. Rendering support is commonly provided through one or more backends, enabling vector or raster output and integration with GUI toolkits. Many gm2d implementations expose a drawing context or scene graph with styling options (stroke, fill, line width, color, patterns) and utilities for transformations (translate, rotate, scale, reflect) and clipping. Some versions add path operations, tessellation, and support for common curve types (Bezier, B-spline).

Implementation notes often describe C++ cores with optional bindings to scripting languages like Python or JavaScript, and permissive licenses that facilitate use in both open-source and commercial software. The design tends to emphasize modularity, allowing developers to swap rendering backends, customize geometry algorithms, or extend with domain-specific shapes.

Common use cases include lightweight graphical user interfaces, 2D computer-aided design tools, data visualization, and educational demonstrations of geometric concepts. Because gm2d refers to multiple projects, it is important to consult the specific repository or documentation to understand the exact feature set, API conventions, and licensing terms.